What lead the Alvarez team to suspect that the asteroid impact crater they were looking for
existed under the sea?
O Analysis of the iridium layers around the globe revealed
salt content.
O They had not found an eligible crater on land, and Earth
is mostly covered by water.
O Analysis of craters on land revealed shock-fractured
quartz
O They found iridium in bedrock that was once under the
sea, and they could measure it.

Texas bluebonnet plants seen in this photo are an example of which ecological unit?

Which of the following scenarios is an example of the bottleneck effect? answers a in south africa, much of the afrikaner population is descended from a small number of dutch colonists. in this population, this is an unusually high frequency of pseudoxanthoma elasticum (pxe), an elastic tissue disorder. b four white-tailed deer are introduced to a park in finland. thirty years after their introduction scientists compare the genes in the population and find that there is no variation. c during the industrial revolution, london's air became filled with soot. as a result, birds started eating more of the lighter moths because they were easier to spot than their darker counterparts. over time, the moth population changed so that there were more darker moths than lighter ones. d 10% of the population of american alligators in an area have the recessive trait albinism. a massive flood results in the death of 80% of the population. of the remaining population, 60% have the recessive trait of albinism.

What molecule does hemoglobin decay into over time